Which of the following is a right specifically afforded to U.S. citizens?

The option that represents a right specifically afforded to U.S. citizens is the freedom of assembly. This right is explicitly protected under the First Amendment of the Constitution, which guarantees citizens the ability to gather peacefully for protests, demonstrations, or any form of collective expression without government interference. This foundational freedom allows citizens to express their views, advocate for change, and participate in the democratic process, which is a key aspect of citizenship in the United States.

While access to government services, diplomatic protection abroad, and the right to file lawsuits are important benefits or protections available to citizens and residents, they are not explicitly outlined as rights in the Constitution in the same way that the freedom of assembly is. Access to government services and the ability to file lawsuits can depend on citizenship status but are generally considered broader privileges that may also apply in various contexts to non-citizens. Diplomatic protection is typically a function of citizenship but does not serve as a direct constitutional right in the same manner as assembly.